NAME

explain_vprintf_or_die - formatted output conversion and report errors

SYNOPSIS

#include <libexplain/vprintf.h>

int explain_vprintf_or_die(const char *format, va_list ap);
int explain_vprintf_on_error(const char *format, va_list ap);

DESCRIPTION

The explain_vprintf_or_die function is used to call the vprintf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_vprintf(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_vprintf_on_error function is used to call the vprintf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_vprintf(3) function, but still returns to the caller.

format: The format, exactly as to be passed to the vprintf(3) system call.
ap: The ap, exactly as to be passed to the vprintf(3) system call.

RETURN VALUE

The explain_vprintf_or_die function only returns on success, see vprintf(3) for more information. On failure, prints an explanation and exits, it does not return.

The explain_vprintf_on_error function always returns the value return by the wrapped vprintf(3) system call.

EXAMPLE

The explain_vprintf_or_die function is intended to be used in a fashion similar to the following example:

int result = explain_vprintf_or_die(format, ap);

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

EXAMPLE

SEE ALSO

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